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Imaging Features of Juvenile Xanthogranuloma of the Pediatric Head and Neck

Imaging Features of Juvenile Xanthogranuloma of the Pediatric Head and Neck BACKGROUND AND PURPOSE: Juvenile xanthogranuloma is a non-Langerhans cell histiocytosis primarily affecting children. The purpose of this study was to characterize the imaging features of histologically confirmed pediatric head and neck juvenile xanthogranuloma. MATERIALS AND METHODS: A retrospective review was performed of medical records and imaging of histologically confirmed head and neck juvenile xanthogranuloma. RESULTS: Ten patients (6 girls, 4 boys) 1 month to 12 years of age were imaged with ultrasound only ( n = 1), CT only ( n = 2), CT and ultrasound ( n = 1), MR imaging only ( n = 3), or MR imaging and CT ( n = 3). Masses were solitary in 9 patients and multiple in 1. Solitary masses were located in the external auditory canal, infra-auricular region, infratemporal fossa with intracranial extension, frontal scalp, and subperiosteal space eroding the calvaria and along the dura. One patient with disseminated disease had scalp-, calvarial-, and dural-based masses. Clinical presentation included a mass or alteration in function. On sonography, juvenile xanthogranuloma appeared hypoechoic. On contrast-enhanced CT, masses appeared homogeneous and isoattenuating with muscle and sometimes eroded bone. On MR imaging, compared with the cerebral cortex, the masses appeared hyper- or isointense on T1 and hypo- or isointense on T2, had decreased diffusivity, and enhanced homogeneously. Juvenile xanthogranuloma was not included in the differential diagnosis in any case. CONCLUSIONS: Head and neck juvenile xanthogranuloma has varied manifestations. Mild hyperintensity on T1, hypointensity on T2 compared with the cerebral cortex, decreased diffusivity, and homogeneous enhancement are characteristic. Awareness of these features should prompt radiologists to include juvenile xanthogranuloma in the differential diagnosis of pediatric head and neck masses. ABBREVIATIONS: HN head and neck JXG juvenile xanthogranuloma LCH Langerhans cell histiocytosis US ultrasound http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png American Journal of Neuroradiology American Journal of Neuroradiology

Imaging Features of Juvenile Xanthogranuloma of the Pediatric Head and Neck

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References (29)

Publisher
American Journal of Neuroradiology
Copyright
Copyright © 2016 by the American Society of Neuroradiology.
ISSN
0195-6108
eISSN
1936-959X
DOI
10.3174/ajnr.A4644
pmid
26744443
Publisher site
See Article on Publisher Site

Abstract

BACKGROUND AND PURPOSE: Juvenile xanthogranuloma is a non-Langerhans cell histiocytosis primarily affecting children. The purpose of this study was to characterize the imaging features of histologically confirmed pediatric head and neck juvenile xanthogranuloma. MATERIALS AND METHODS: A retrospective review was performed of medical records and imaging of histologically confirmed head and neck juvenile xanthogranuloma. RESULTS: Ten patients (6 girls, 4 boys) 1 month to 12 years of age were imaged with ultrasound only ( n = 1), CT only ( n = 2), CT and ultrasound ( n = 1), MR imaging only ( n = 3), or MR imaging and CT ( n = 3). Masses were solitary in 9 patients and multiple in 1. Solitary masses were located in the external auditory canal, infra-auricular region, infratemporal fossa with intracranial extension, frontal scalp, and subperiosteal space eroding the calvaria and along the dura. One patient with disseminated disease had scalp-, calvarial-, and dural-based masses. Clinical presentation included a mass or alteration in function. On sonography, juvenile xanthogranuloma appeared hypoechoic. On contrast-enhanced CT, masses appeared homogeneous and isoattenuating with muscle and sometimes eroded bone. On MR imaging, compared with the cerebral cortex, the masses appeared hyper- or isointense on T1 and hypo- or isointense on T2, had decreased diffusivity, and enhanced homogeneously. Juvenile xanthogranuloma was not included in the differential diagnosis in any case. CONCLUSIONS: Head and neck juvenile xanthogranuloma has varied manifestations. Mild hyperintensity on T1, hypointensity on T2 compared with the cerebral cortex, decreased diffusivity, and homogeneous enhancement are characteristic. Awareness of these features should prompt radiologists to include juvenile xanthogranuloma in the differential diagnosis of pediatric head and neck masses. ABBREVIATIONS: HN head and neck JXG juvenile xanthogranuloma LCH Langerhans cell histiocytosis US ultrasound

Journal

American Journal of NeuroradiologyAmerican Journal of Neuroradiology

Published: May 1, 2016

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